package promotion

import (
	"fmt"
	"recook/internal/back"
	"recook/internal/dbc"
	"recook/internal/model/goods"
	"recook/internal/model/promotion"
	"recook/tools"
	"strconv"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/golangkit/formatime"
	"github.com/shopspring/decimal"
)

type createPromotionParam struct {
	Name      string     `json:"name" validate:"required"`
	StartDate string     `json:"startDate" validate:"required" time_format:"2006-01-02"`
	EndDate   string     `json:"endDate" validate:"required" time_format:"2006-01-02"`
	TimeItems []timeItem `json:"timeItems" validate:"required"`
	IsSale    bool       `json:"is_sale"`
}

type timeItem struct {
	StartPoint     int                  `json:"startPoint" validate:"required"`
	GoodsList      []promotionGoods     `json:"goodsList" validate:"required"`
	ActivitiesList []promotionActivites `json:"activitiesList"`
}

type promotionActivites struct {
	ActivityID     uint `json:"activityId" validate:"numeric"`
	ActivitySortId uint `json:"activity_sort_id"`
}
type promotionGoods struct {
	GoodsID  uint           `json:"goodsId" validate:"required"`
	Subtitle string         `json:"subtitle"`
	Order    string         `json:"order"`
	SkuList  []promotionSku `json:"skuList" validate:"required"`
}

type promotionSku struct {
	SkuID         uint    `json:"skuId" validate:"required"`
	DiscountPrice float64 `json:"discountPrice" validate:"required"`
	Inventory     uint    `json:"inventory" validate:"required"`
}

func CreatePromotion(c *gin.Context) {
	var p createPromotionParam
	if err := tools.Params(&p, c); err != nil {
		back.Fail(c, err.Error())
		return
	}

	if len(p.TimeItems) == 0 {
		back.Fail(c, "参数不完整")
		return
	}

	startDate, err := time.Parse("2006-01-02", p.StartDate)
	if err != nil {
		back.Fail(c, "日期无法解析")
		return
	}
	endDate, err := time.Parse("2006-01-02", p.EndDate)
	if err != nil {
		back.Fail(c, "日期无法解析")
		return
	}

	if startDate.Unix() > endDate.Unix() {
		back.Fail(c, "开始时间不能大于结束时间")
		return
	}

	// 判断日期提前
	var count uint
	dbc.DB.Table((&promotion.Information{}).TableName()).
		Where("is_sale=?", p.IsSale).Where("start_date = ?", startDate.Format("2006-01-02")).Count(&count)
	if count > 0 {
		back.Fail(c, "该日期已创建过活动,请更改日期")
		return
	}

	endTime := time.Date(endDate.Year(), endDate.Month(), endDate.Day(), 23, 59, 59, 0, time.Local)
	// // 先检测
	// {
	// 	var promotionGoodsList []promotion.Goods
	// 	dbc.DB.Select("id, goods_id").Find(&promotionGoodsList, "start_time < ? AND end_time > ?", endTime, startTime)

	// 	ids := map[uint]uint{}
	// 	for _, v := range promotionGoodsList {
	// 		ids[v.GoodsID] = 1
	// 	}

	// 	for _, v := range p.TimeItems {
	// 		for _, v2 := range v.GoodsList {
	// 			if _, ok := ids[v2.GoodsID]; ok {
	// 				back.Fail(c, "商品活动冲突")
	// 				return
	// 			}
	// 		}

	// 		if len(v.ActivitiesList) < 1 {
	// 			continue
	// 		}
	// 	}
	// }

	//for _, v := range p.TimeItems {
	//	for _, g := range v.GoodsList {
	//		var goodsSkuList []goods.Sku
	//		dbc.DB.Select("id").Find(&goodsSkuList, "goods_id = ?", g.GoodsID)
	//		for _, origin := range goodsSkuList { // 要看看每个sku都有填充数据
	//			aBool := false
	//			for _, sku := range g.SkuList {
	//				if origin.ID == sku.SkuID {
	//					aBool = true
	//					break
	//				}
	//			}
	//			if aBool == false {
	//				back.Fail(c, "sku不完整,商品ID为："+fmt.Sprintf("%d", g.GoodsID))
	//				return
	//			}
	//		}
	//	}
	//}

	formatEndTime := formatime.NewSecondFrom(endTime)

	tx := dbc.DB.Begin()
	{
		info := promotion.Information{
			Name:      p.Name,
			StartDate: formatime.NewDateFrom(startDate),
			EndDate:   formatime.NewDateFrom(endDate),
			IsSale:    p.IsSale,
		}
		if err := tx.Create(&info).Error; err != nil {
			back.Err(c, err.Error())
			tx.Rollback()
			return
		}

		for _, v := range p.TimeItems {
			if v.StartPoint < 0 || v.StartPoint > 23 {
				back.Fail(c, "参数时间错误")
				tx.Rollback()
				return
			}

			startTime := formatime.NewSecondFrom(time.Date(startDate.Year(), startDate.Month(), startDate.Day(), v.StartPoint, 0, 0, 0, time.Local))

			timeItem := promotion.TimeItem{
				PromotionID:   info.ID,
				PromotionName: info.Name,
				StartTime:     startTime,
				EndTime:       formatEndTime,
			}
			if err = tx.Create(&timeItem).Error; err != nil {
				back.Err(c, err.Error())
				tx.Rollback()
				return
			}

			if len(v.GoodsList) > 0 && v.GoodsList[0].GoodsID > 0 {
				for _, g := range v.GoodsList {
					totalInventory := 0
					for _, sku := range g.SkuList {
						inventory := sku.Inventory
						if p.IsSale {
							inventory = 9999
						}
						totalInventory += int(inventory)
					}
					order, _ := strconv.Atoi(g.Order)

					promotionGoods := promotion.Goods{
						PromotionTimeItemID: timeItem.ID,
						PromotionID:         info.ID,
						PromotionStartDate:  formatime.NewDateFrom(startDate),
						PromotionName:       info.Name,
						StartTime:           startTime,
						EndTime:             formatEndTime,
						GoodsID:             g.GoodsID,
						Subtitle:            g.Subtitle,
						TotalInventory:      uint(totalInventory),
						Order:               order,
					}
					if err = tx.Create(&promotionGoods).Error; err != nil {
						back.Err(c, "Goods数据错误："+err.Error())
						tx.Rollback()
						return
					}

					for _, sku := range g.SkuList {
						var goodsSku goods.Sku
						dbc.DB.First(&goodsSku, sku.SkuID)
						if goodsSku.GoodsID != promotionGoods.GoodsID {
							es := fmt.Sprintf("%s-%d-%d", "sku没有匹配到商品", goodsSku.GoodsID, promotionGoods.GoodsID)
							back.Fail(c, es)
							tx.Rollback()
							return
						}

						discount := decimal.NewFromFloat(sku.DiscountPrice).Truncate(2)
						commission := decimal.NewFromFloat(sku.DiscountPrice).Mul(goodsSku.CommissionRate).Truncate(2)
						i1 := sku.Inventory
						if p.IsSale {
							discount = goodsSku.SalePurchasePrice
							commission = decimal.Zero
							i1 = 9999
						}
						s := promotion.Sku{
							PromotionGoodsID: promotionGoods.ID,
							GoodsID:          promotionGoods.GoodsID,
							SkuID:            sku.SkuID,
							DiscountPrice:    discount,
							Commission:       commission,
							SkuName:          goodsSku.Name,
							SkuCode:          goodsSku.Code,
							Inventory:        i1,
						}
						if err = tx.Create(&s).Error; err != nil {
							back.Err(c, "数据错误："+err.Error())
							tx.Rollback()
							return
						}
					}
				}
			}

			if len(v.ActivitiesList) > 0 && v.ActivitiesList[0].ActivityID > 0 {
				for _, act := range v.ActivitiesList {
					// 放入活动前要检查， 本次时间只有一个活动在
					var testGoods promotion.Goods
					dbc.DB.Select("start_time=?", startTime).First(&testGoods)
					if testGoods.ID > 0 {
						back.Err(c, "每个时间段只允许有一个活动")
						tx.Rollback()
						return
					}
					promotionGoods := promotion.Goods{
						PromotionTimeItemID: timeItem.ID,
						PromotionID:         info.ID,
						PromotionStartDate:  formatime.NewDateFrom(startDate),
						PromotionName:       info.Name,
						StartTime:           startTime,
						EndTime:             formatEndTime,
						GoodsID:             0,
						ActivityID:          act.ActivityID,     // 保存活动ID
						Subtitle:            "",                 // 子标题咱不保存
						TotalInventory:      0,                  // 活动默认库存为0
						ActivitySortId:      act.ActivitySortId, //新增多品排序位置
					}
					if err = tx.Create(&promotionGoods).Error; err != nil {
						back.Err(c, err.Error())
						tx.Rollback()
						return
					}
				}
			}
		}
	}
	tx.Commit()
	back.Suc(c, "操作成功", nil)
}